Tridonic Gmbh Co. Kg

Zumtobel Lighting Gmbh

Paul Dalby

Deepak Makwana

Wayne Bell

Ian Wilson

Jamie Kelly

Andre Mitterbacher

Hans Auer

James Frankland

John Kears

Stephen Parkes

Shukla Jagjitpati

Gregor Mayr

John Richardson

Kevin McDermott

Graeme Jones

Chong Ng

Simon Lecker

Kevin Mcdermott

Reinhard Pfatschbacher

Dominik ZÜGER

Simon Massey

The invention proposes a lighting device, in particular an emergency lighting device. The lighting device includes a first housing (), a lighting means (), for example an LED arranged at the first housing () and an electronic circuitry accommodated in the first housing () for operating the lighting means (). A second housing () of the lighting device accommodates an energy storage means () such as a rechargeable battery, wherein the first housing () and the second housing () are arranged spaced apart. An interconnecting means () mechanically connects the first housing () and the second housing () in an elastic manner and also connects electrically the electronic circuitry and the energy storage means (). The interconnecting means () of the lighting device of a preferred embodiment comprises a cable which is overmoulded to provide compressive strength in an axial direction of the cable.

Lighting device

The invention relates to an operating device () for operating lighting means, in particular LEDs, comprising: a potential-isolated clocked converter (), having a transformer (T), which has a primary winding (N) and a seconding winding (N), and having a controllable switch (M) arranged on the primary side, wherein the converter () can be supplied with a supply voltage converter (); means () for directly or indirectly sensing the output voltage (Vout); and a control unit (ST) for controlling the switch (M), wherein the secondary current (I) through the secondary winding (N) linearly drops, starting from a position value (Imax), which the switch (M) is switched off, wherein the control unit (ST) is designed to adaptively sense a discharge duration (Tdischarge) between a switch-off of the switch (M) and a subsequent drop in the secondary current () to zero in order to control the secondary current (I).

LED driver

An integrated control circuit (SE) and method for operating luminaries are provided. The integrated control circuit has at least one output for supplying a signal controlling a switch, such as a transistor, in an operating circuit (OM), in particular controlling directly or indirectly a dimming level of the luminaries, and a common input (Ts) arranged for being supplied with a combination of a temperature indicating signal and a presence indicating signal, the integrated control circuit (SE) being designed to adjust a switch control signal as a function of the electrical signal (ES) at the common input (Ts).

Integrated control circuit with combined temperature and presence detection

In a first aspect, the invention provides an LED converter, comprising: a resonant converter with a switching regulator, preferably a clocked half-bridge converter, a galvanic barrier, the primary side of which being supplied by the switching regulator and the secondary side of which being arranged for providing directly or indirectly power to terminals for connecting one or more LEDs, a control circuit on the primary side of the galvanic barrier of the resonant converter, a sensing means on the secondary side of the galvanic barrier sensing a secondary side electric parameter indicative of an LED load, when connected to said terminals, a feedback path from the sensing means to the control circuit adapted to feedback the secondary side electric parameter from the secondary side of the galvanic barrier to the primary side of the galvanic barrier, wherein in case no LED string is connected to the LED converter, the control unit is adapted to cyclically control a switching frequency of switching regulator switches, in particular switches of the clocked half-bridge, from a high frequency to a lower frequency, and to monitor whether the secondary side electric parameter reaches a predetermined threshold value, and to, in case the predetermined threshold value is reached, deactivate the switching regulator switches and to activate a voltage protection switch to pull the secondary side electric parameter to ground.

Lighting means insertion detection

A power factor correction circuit includes an inductor L1, a diode D1, a switch Q3 and a controller. An input voltage Vis applied to the inductor L1 which is cyclically discharged through the diode D1 by the operation of the switch Q3. The switch Q3 is controlled by the controllerwhich varies the on period of the switch Q3, during which the inductor is charged, for adjusting an output voltage Vtowards a target value V. The method includes obtaining an indication of the inductor L1 reaching a discharged state in response to the switch being in an off state. The controllermonitors at least one of the switch on period Tand the switch off period Tto identify when the input voltage Vis an alternating voltage AC input, and when it is likely to be a non-alternating voltage DC input. When a non alternating voltage is detected, steps may be taken to reduce interference.

Power factor correction

The application relates to a circuit for operating a light-emitting means, having a half-bridge or full-bridge circuit for providing a supply voltage for the at least one light-emitting means, and a control circuit for the closed-loop control of the operation of the light-emitting means and/or fault identification. A measurement signal which represents the current through the bridge circuit and/or a measurement signal which represents the lamp current and a measurement signal which represents the voltage across the at least one light-emitting means are supplied to the control circuit at the same input.

Method, operating device, and lighting system

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Middlesbrough, United Kingdom

Paul Dalby